It takes us about ____ hour to get to the Yangzhou-Taizhou Airport from Taizhou by ____ bus.
I was just falling asleep ____ there was a loud knock at the door.
----Can you tell me if he ________ ?----If he _________, I will call you.
There are many shops on ________ side of the street.
The policeman warned the driver _______too fast. It was very dangerous.
It is important for us English well.